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bpo-40331: Increase test coverage for the statistics module #19608

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Merged
merged 10 commits into from
May 13, 2020
Merged

bpo-40331: Increase test coverage for the statistics module #19608

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ccd8bef
bpo-40331: increase test coverage for the statistics module
tzabal Apr 19, 2020
21084c1
Add a News entry using the blurb tool
tzabal Apr 19, 2020
49def61
Revert cosmetic change in docstring
tzabal Apr 19, 2020
b2b9844
Remove the News entry
tzabal Apr 20, 2020
50a843f
Use assertRaises as a context manager in the tests
tzabal Apr 25, 2020
bbe16bd
Use assertRaisesRegex in the test_single_value_unsupported_type test
tzabal Apr 26, 2020
74b047a
Add test for inputs with multiple mixed valid/invalid values
tzabal Apr 26, 2020
1a5c2df
Rename tests and remove comments as requested in review
tzabal Apr 26, 2020
ac8b586
Combine two unit tests into one
tzabal Apr 26, 2020
ee55b16
Use subTest in tests with 3 or more cases
tzabal Apr 27, 2020
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Use assertRaises as a context manager in the tests
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@tzabal
tzabal committed Apr 25, 2020
commit 50a843fceff657a2107b37a7563deeec46a2e7b2
16 changes: 10 additions & 6 deletions Lib/test/test_statistics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1005,7 +1005,8 @@ def test_nan(self):
self.assertTrue(_nan_equal(x, nan))

def test_raise_type_error(self):
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Let's rename this test_invalid_input_type()

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Done.

self.assertRaises(TypeError, statistics._convert, None, float)
with self.assertRaises(TypeError):
statistics._convert(None, float)


class FailNegTest(unittest.TestCase):
Expand Down Expand Up @@ -1045,7 +1046,8 @@ def test_raise_value_error(self):
([1, 2], 3), # non-existing max value triggers `i != len(a)`
([1, 3], 2) # non-existing value triggers `a[i] == x`
]:
self.assertRaises(ValueError, statistics._find_lteq, a, x)
with self.assertRaises(ValueError):
statistics._find_lteq(a, x)

def test_locate_successfully(self):
for a, x, expected_i in [
Expand All @@ -1064,7 +1066,8 @@ def test_raise_value_error(self):
([1], 2, 1), # when l=len(a)+1 triggers `i != (len(a)+1)`
([1, 3], 0, 2) # non-existing value triggers `a[i-1] == x`
]:
self.assertRaises(ValueError, statistics._find_rteq, a, l, x)
with self.assertRaises(ValueError):
statistics._find_rteq(a, l, x)

def test_locate_successfully(self):
for a, l, x, expected_i in [
Expand Down Expand Up @@ -1496,9 +1499,6 @@ class TestHarmonicMean(NumericTestCase, AverageMixin, UnivariateTypeMixin):
def setUp(self):
self.func = statistics.harmonic_mean

def test_single_value_unsupported_type(self):
self.assertRaises(TypeError, self.func, ['3.14'])

def prepare_data(self):
# Override mixin method.
values = super().prepare_data()
Expand All @@ -1521,6 +1521,10 @@ def test_negative_error(self):
with self.subTest(values=values):
self.assertRaises(exc, self.func, values)

def test_single_value_unsupported_type(self):
with self.assertRaises(TypeError):
self.func(['3.14'])

def test_ints(self):
# Test harmonic mean with ints.
data = [2, 4, 4, 8, 16, 16]
Expand Down
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